Accrued Expenses and Other Short Term Liabilities - Schedule of Accrued Expenses and Other Short Term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities and Other Liabilities [Abstract]
Government authorities and other	$ 37,268	$ 24,689
Employees	32,593	23,479
Accrued expenses	13,337	13,766
Foreign exchange forward contract derivatives	0	470
Other short-term liabilities	0	203
Accrued expenses and other short-term liabilities	$ 83,198	$ 62,607